Ogilvy & Mather Worldwide’s monster win of IBM Corp’s entire advertising account, valued at up to $500m, has cost it perhaps $100m in other billings as AT&T Corp struck Ogilvy & Mather from its list of agencies, citing conflict of interest.
Ogilvy & Mather Worldwide’s monster win of IBM Corp’s entire advertising account, valued at up to $500m, has cost it perhaps $100m in other billings as AT&T Corp struck Ogilvy & Mather from its list of agencies, citing conflict of interest.
